Joannes Laveyne
@jolaveyne.bsky.social
PhD MSc at Electrical Energy Lab of Ghent University. Spaceflight enthusiast. Speelvogel. West-Vlaming in Hent. Stating a personal opinion.
Hey Siri, wat is 60% meer van niets?
October 31, 2025 at 10:05 PM
Hey Siri, wat is 60% meer van niets?
Mia Doornaert doet een oproep aan politici: “Luister meer naar de gewone mens”
www.standaard.be/opinies/mia-...
www.standaard.be/opinies/mia-...
October 30, 2025 at 12:16 PM
Mia Doornaert doet een oproep aan politici: “Luister meer naar de gewone mens”
www.standaard.be/opinies/mia-...
www.standaard.be/opinies/mia-...
Waar de nadelen van katoen (hoog land- en watergebruik) en polyester (fossiele uitstoot en microplastics) zich nog wat aan elkaar kunnen meten, is wol overigens een van de minst duurzame materialen, zowel naar klimaatimpact als dierenwelzijn.
October 17, 2025 at 10:45 AM
Waar de nadelen van katoen (hoog land- en watergebruik) en polyester (fossiele uitstoot en microplastics) zich nog wat aan elkaar kunnen meten, is wol overigens een van de minst duurzame materialen, zowel naar klimaatimpact als dierenwelzijn.
België behoort tot de landen met de striktste reliability standards (LOLE 3hr). Maar: hoe strikter, hoe duurder. Capaciteit achter de hand houden kost geld. Aanvaarden dat de *kans* om in het donker te zitten van 3 naar 6 uur/jaar stijgt zou pakweg al een gesubsidieerde gascentrale kunnen schelen.
October 10, 2025 at 8:35 AM
België behoort tot de landen met de striktste reliability standards (LOLE 3hr). Maar: hoe strikter, hoe duurder. Capaciteit achter de hand houden kost geld. Aanvaarden dat de *kans* om in het donker te zitten van 3 naar 6 uur/jaar stijgt zou pakweg al een gesubsidieerde gascentrale kunnen schelen.
This stability has everything to do with the quality of the forecasts. Predicted and measured wind and solar production matched almost perfectly. Renewable energy may be intermittent, but it is not unpredictable. And we are getting better and better at it. /
October 6, 2025 at 10:01 PM
This stability has everything to do with the quality of the forecasts. Predicted and measured wind and solar production matched almost perfectly. Renewable energy may be intermittent, but it is not unpredictable. And we are getting better and better at it. /
Perhaps the most striking observation: the system imbalance rarely exceeded ±400 MW and the imbalance price fluctuated around €0/MWh for most of the time. In other words, the system maintained its frequency better than a Swiss clock. /
October 6, 2025 at 10:01 PM
Perhaps the most striking observation: the system imbalance rarely exceeded ±400 MW and the imbalance price fluctuated around €0/MWh for most of the time. In other words, the system maintained its frequency better than a Swiss clock. /
Electricity prices remained close to or below zero for most of the weekend, only rising late on Sunday (to a still acceptable level these days).
It is quite rare for prices to be so low for an entire day. This shows how quickly market dynamics are changing. /
It is quite rare for prices to be so low for an entire day. This shows how quickly market dynamics are changing. /
October 6, 2025 at 10:01 PM
Electricity prices remained close to or below zero for most of the weekend, only rising late on Sunday (to a still acceptable level these days).
It is quite rare for prices to be so low for an entire day. This shows how quickly market dynamics are changing. /
It is quite rare for prices to be so low for an entire day. This shows how quickly market dynamics are changing. /
It may have escaped your attention, but the Belgian energy system has quietly passed an important test. During the weekend of 4-5 October 2025, our consumption was almost entirely covered by renewable energy. And yet the system ticked like a Swiss watch. /
October 6, 2025 at 10:01 PM
It may have escaped your attention, but the Belgian energy system has quietly passed an important test. During the weekend of 4-5 October 2025, our consumption was almost entirely covered by renewable energy. And yet the system ticked like a Swiss watch. /
"Slechts 1% van de woningen staat leeg, en in centrumsteden nog veel minder" was toch eigenlijk een betere kop geweest, niet?
October 6, 2025 at 10:36 AM
"Slechts 1% van de woningen staat leeg, en in centrumsteden nog veel minder" was toch eigenlijk een betere kop geweest, niet?
The official ENTSO-E report on the Spanish blackout, released today, seems to confirm in detail what was already broadly known: a power surge event led to the shutdown of high-voltage lines and production units, plunging the peninsula into darkness in 30 seconds. 🧵
October 3, 2025 at 1:15 PM
The official ENTSO-E report on the Spanish blackout, released today, seems to confirm in detail what was already broadly known: a power surge event led to the shutdown of high-voltage lines and production units, plunging the peninsula into darkness in 30 seconds. 🧵
EDF itself claims a production cost of €79.7MWh.
This figure is important because, starting next year, the French government will skim 50% of the nuclear profits that EDF makes from market prices for electricity that are €5 higher than the production cost. /
This figure is important because, starting next year, the French government will skim 50% of the nuclear profits that EDF makes from market prices for electricity that are €5 higher than the production cost. /
September 30, 2025 at 10:06 PM
EDF itself claims a production cost of €79.7MWh.
This figure is important because, starting next year, the French government will skim 50% of the nuclear profits that EDF makes from market prices for electricity that are €5 higher than the production cost. /
This figure is important because, starting next year, the French government will skim 50% of the nuclear profits that EDF makes from market prices for electricity that are €5 higher than the production cost. /
What is the production cost of one MWh of French nuclear energy? According to French energy regulator CRE, it is €60.3/MWh. This is the cost of the existing fleet, without new reactors. The current French forward price for electricity is €56-61/MWh. www.cre.fr/actualites/t... /
September 30, 2025 at 10:06 PM
What is the production cost of one MWh of French nuclear energy? According to French energy regulator CRE, it is €60.3/MWh. This is the cost of the existing fleet, without new reactors. The current French forward price for electricity is €56-61/MWh. www.cre.fr/actualites/t... /
France currently has low energy prices due to overcapacity: electricity demand continues to decline while generation capacity is increasing again (after years of technical problems with their nuclear power plants). But overcapacity costs money, and someone has to foot the bill.
September 24, 2025 at 9:33 PM
France currently has low energy prices due to overcapacity: electricity demand continues to decline while generation capacity is increasing again (after years of technical problems with their nuclear power plants). But overcapacity costs money, and someone has to foot the bill.
En lijkt ook gewoon zo uit de alt-right sphere overgenomen te zijn.
September 13, 2025 at 1:40 PM
En lijkt ook gewoon zo uit de alt-right sphere overgenomen te zijn.
Me every time a thunderstorm hits. #lightningmaps
September 13, 2025 at 1:34 PM
Me every time a thunderstorm hits. #lightningmaps
Just another Sunday afternoon in my hometown, surrounded by buildings a century older than the USA.
September 7, 2025 at 3:46 PM
Just another Sunday afternoon in my hometown, surrounded by buildings a century older than the USA.
Friedrichshain-Kreuzberg. Shot with a Pixel 9.
September 2, 2025 at 9:09 PM
Friedrichshain-Kreuzberg. Shot with a Pixel 9.
Update: just received my package, 19 days after ordering and 18 days in transit – including 11 days for export/import clearance despite the IOSS procedure. It's a 5-hour drive between the UK sender and my location in Ghent, Belgium. Thanks, Brexit.
August 25, 2025 at 10:12 PM
Update: just received my package, 19 days after ordering and 18 days in transit – including 11 days for export/import clearance despite the IOSS procedure. It's a 5-hour drive between the UK sender and my location in Ghent, Belgium. Thanks, Brexit.
This is how doing business with post-Brexit UK looks like. Ordering components from across the Channel to mainland Europe now takes longer than ordering the same components from China. Yet both use the same IOSS procedure. 🤷♂️
My package has been stuck at the UK export hub for ten days now.
My package has been stuck at the UK export hub for ten days now.
August 18, 2025 at 8:29 PM
This is how doing business with post-Brexit UK looks like. Ordering components from across the Channel to mainland Europe now takes longer than ordering the same components from China. Yet both use the same IOSS procedure. 🤷♂️
My package has been stuck at the UK export hub for ten days now.
My package has been stuck at the UK export hub for ten days now.
Does the day-ahead market actually still use marginal pricing only? This evening, the electricity price will briefly peak at 7x the gas price. This suggests that gas-fired power stations are also factoring in start-up (and possibly fixed) costs into their spot price. Or are batteries going YOLO?
August 14, 2025 at 9:09 AM
Does the day-ahead market actually still use marginal pricing only? This evening, the electricity price will briefly peak at 7x the gas price. This suggests that gas-fired power stations are also factoring in start-up (and possibly fixed) costs into their spot price. Or are batteries going YOLO?
A box plot shows that the statistical minimum price previous summer was €-50/MWh, while it is now just around €0/MWh. Prices below €-1/MWh are statistical outliers this summer. In my opinion, this indicates deliberate intervention:
August 13, 2025 at 8:27 PM
A box plot shows that the statistical minimum price previous summer was €-50/MWh, while it is now just around €0/MWh. Prices below €-1/MWh are statistical outliers this summer. In my opinion, this indicates deliberate intervention:
At least if you compared my graphs. More remarkable is that the profile of the negative price curve during summer has changed significantly. We see negative prices during slightly fewer hours, but above all, their depth has been greatly reduced. /
August 13, 2025 at 8:27 PM
At least if you compared my graphs. More remarkable is that the profile of the negative price curve during summer has changed significantly. We see negative prices during slightly fewer hours, but above all, their depth has been greatly reduced. /